Fix clippy::implicit_clone

.github/workflows/code-quality.yml

@@ -117,7 +117,7 @@ jobs:
       run: |
         ## `cargo clippy` lint testing
         unset fault
-        CLIPPY_FLAGS="-W clippy::default_trait_access -W clippy::manual_string_new -W clippy::cognitive_complexity"
+        CLIPPY_FLAGS="-W clippy::default_trait_access -W clippy::manual_string_new -W clippy::cognitive_complexity -W clippy::implicit_clone"
         fault_type="${{ steps.vars.outputs.FAULT_TYPE }}"
         fault_prefix=$(echo "$fault_type" | tr '[:lower:]' '[:upper:]')
         # * convert any warnings to GHA UI annotations; ref: <https://help.github.com/en/actions/reference/workflow-commands-for-github-actions#setting-a-warning-message>

src/uu/base32/src/base_common.rs

@@ -54,7 +54,7 @@ impl Config {
                             format!("{}: No such file or directory", name.maybe_quote()),
                         ));
                     }
-                    Some(name.to_owned())
+                    Some(name.clone())
                 }
             }
             None => None,

src/uu/cat/src/cat.rs

@@ -213,7 +213,7 @@ pub fn uumain(args: impl uucore::Args) -> UResult<()> {
 
     let squeeze_blank = matches.get_flag(options::SQUEEZE_BLANK);
     let files: Vec<String> = match matches.get_many::<String>(options::FILE) {
-        Some(v) => v.clone().map(|v| v.to_owned()).collect(),
+        Some(v) => v.cloned().collect(),
         None => vec!["-".to_owned()],
     };
 

src/uu/csplit/src/csplit.rs

@@ -62,15 +62,9 @@ impl CsplitOptions {
             split_name: crash_if_err!(
                 1,
                 SplitName::new(
-                    matches
-                        .get_one::<String>(options::PREFIX)
-                        .map(|s| s.to_owned()),
-                    matches
-                        .get_one::<String>(options::SUFFIX_FORMAT)
-                        .map(|s| s.to_owned()),
-                    matches
-                        .get_one::<String>(options::DIGITS)
-                        .map(|s| s.to_owned())
+                    matches.get_one::<String>(options::PREFIX).cloned(),
+                    matches.get_one::<String>(options::SUFFIX_FORMAT).cloned(),
+                    matches.get_one::<String>(options::DIGITS).cloned()
                 )
             ),
             keep_files,

src/uu/cut/src/cut.rs

@@ -400,7 +400,7 @@ pub fn uumain(args: impl uucore::Args) -> UResult<()> {
                         if s.is_empty() {
                             Some("\0".to_owned())
                         } else {
-                            Some(s.to_owned())
+                            Some(s.clone())
                         }
                     }
                     None => None,
@@ -491,7 +491,7 @@ pub fn uumain(args: impl uucore::Args) -> UResult<()> {
     let files: Vec<String> = matches
         .get_many::<String>(options::FILE)
         .unwrap_or_default()
-        .map(|s| s.to_owned())
+        .cloned()
         .collect();
 
     match mode_parse {

src/uu/dirname/src/dirname.rs

@@ -30,7 +30,7 @@ pub fn uumain(args: impl uucore::Args) -> UResult<()> {
     let dirnames: Vec<String> = matches
         .get_many::<String>(options::DIR)
         .unwrap_or_default()
-        .map(|s| s.to_owned())
+        .cloned()
         .collect();
 
     if dirnames.is_empty() {

src/uu/du/src/du.rs

@@ -506,7 +506,7 @@ fn build_exclude_patterns(matches: &ArgMatches) -> UResult<Vec<Pattern>> {
     let excludes_iterator = matches
         .get_many::<String>(options::EXCLUDE)
         .unwrap_or_default()
-        .map(|v| v.to_owned());
+        .cloned();
 
     let mut exclude_patterns = Vec::new();
     for f in excludes_iterator.chain(exclude_from_iterator) {

src/uu/fold/src/fold.rs

@@ -35,7 +35,7 @@ pub fn uumain(args: impl uucore::Args) -> UResult<()> {
     let bytes = matches.get_flag(options::BYTES);
     let spaces = matches.get_flag(options::SPACES);
     let poss_width = match matches.get_one::<String>(options::WIDTH) {
-        Some(v) => Some(v.to_owned()),
+        Some(v) => Some(v.clone()),
         None => obs_width,
     };
 
@@ -50,7 +50,7 @@ pub fn uumain(args: impl uucore::Args) -> UResult<()> {
     };
 
     let files = match matches.get_many::<String>(options::FILE) {
-        Some(v) => v.map(|v| v.to_owned()).collect(),
+        Some(v) => v.cloned().collect(),
         None => vec!["-".to_owned()],
     };
 

src/uu/head/src/head.rs

@@ -205,7 +205,7 @@ impl HeadOptions {
         options.mode = Mode::from(matches)?;
 
         options.files = match matches.get_many::<String>(options::FILES_NAME) {
-            Some(v) => v.map(|s| s.to_owned()).collect(),
+            Some(v) => v.cloned().collect(),
             None => vec!["-".to_owned()],
         };
         //println!("{:#?}", options);

src/uu/install/src/install.rs

@@ -375,9 +375,7 @@ fn behavior(matches: &ArgMatches) -> UResult<Behavior> {
     };
 
     let backup_mode = backup_control::determine_backup_mode(matches)?;
-    let target_dir = matches
-        .get_one::<String>(OPT_TARGET_DIRECTORY)
-        .map(|d| d.to_owned());
+    let target_dir = matches.get_one::<String>(OPT_TARGET_DIRECTORY).cloned();
 
     let preserve_timestamps = matches.get_flag(OPT_PRESERVE_TIMESTAMPS);
     let compare = matches.get_flag(OPT_COMPARE);
@@ -593,7 +591,7 @@ fn standard(mut paths: Vec<String>, b: &Behavior) -> UResult<()> {
         let source = sources.first().unwrap();
 
         if source.is_dir() {
-            return Err(InstallError::OmittingDirectory(source.to_path_buf()).into());
+            return Err(InstallError::OmittingDirectory(source.clone()).into());
         }
 
         if target.is_file() || is_new_file_path(&target) {
@@ -628,7 +626,7 @@ fn copy_files_into_dir(files: &[PathBuf], target_dir: &Path, b: &Behavior) -> UR
         }
 
         if sourcepath.is_dir() {
-            let err = InstallError::OmittingDirectory(sourcepath.to_path_buf());
+            let err = InstallError::OmittingDirectory(sourcepath.clone());
             show!(err);
             continue;
         }
@@ -701,12 +699,9 @@ fn perform_backup(to: &Path, b: &Behavior) -> UResult<Option<PathBuf>> {
         if let Some(ref backup_path) = backup_path {
             // TODO!!
             if let Err(err) = fs::rename(to, backup_path) {
-                return Err(InstallError::BackupFailed(
-                    to.to_path_buf(),
-                    backup_path.to_path_buf(),
-                    err,
-                )
-                .into());
+                return Err(
+                    InstallError::BackupFailed(to.to_path_buf(), backup_path.clone(), err).into(),
+                );
             }
         }
         Ok(backup_path)

src/uu/ls/src/ls.rs

@@ -577,9 +577,7 @@ fn extract_color(options: &clap::ArgMatches) -> bool {
 ///
 /// A QuotingStyle variant representing the quoting style to use.
 fn extract_quoting_style(options: &clap::ArgMatches, show_control: bool) -> QuotingStyle {
-    let opt_quoting_style = options
-        .get_one::<String>(options::QUOTING_STYLE)
-        .map(|cmd_line_qs| cmd_line_qs.to_owned());
+    let opt_quoting_style = options.get_one::<String>(options::QUOTING_STYLE).cloned();
 
     if let Some(style) = opt_quoting_style {
         match style.as_str() {
@@ -788,9 +786,7 @@ impl Config {
             match parse_size_u64(&raw_bs.to_string_lossy()) {
                 Ok(size) => Some(size),
                 Err(_) => {
-                    show!(LsError::BlockSizeParseError(
-                        cmd_line_bs.unwrap().to_owned()
-                    ));
+                    show!(LsError::BlockSizeParseError(cmd_line_bs.unwrap().clone()));
                     None
                 }
             }
@@ -3056,7 +3052,7 @@ fn display_file_name(
                             target_data.must_dereference,
                         ) {
                             Ok(md) => md,
-                            Err(_) => path.md(out).unwrap().to_owned(),
+                            Err(_) => path.md(out).unwrap().clone(),
                         };
 
                         name.push_str(&color_name(
@@ -3073,11 +3069,7 @@ fn display_file_name(
                 }
             }
             Err(err) => {
-                show!(LsError::IOErrorContext(
-                    err,
-                    path.p_buf.to_path_buf(),
-                    false
-                ));
+                show!(LsError::IOErrorContext(err, path.p_buf.clone(), false));
             }
         }
     }
@@ -3087,7 +3079,7 @@ fn display_file_name(
     if config.context {
         if let Some(pad_count) = prefix_context {
             let security_context = if matches!(config.format, Format::Commas) {
-                path.security_context.to_owned()
+                path.security_context.clone()
             } else {
                 pad_left(&path.security_context, pad_count)
             };

src/uu/mkfifo/src/mkfifo.rs

@@ -42,7 +42,7 @@ pub fn uumain(args: impl uucore::Args) -> UResult<()> {
     };
 
     let fifos: Vec<String> = match matches.get_many::<String>(options::FIFO) {
-        Some(v) => v.clone().map(|s| s.to_owned()).collect(),
+        Some(v) => v.cloned().collect(),
         None => return Err(USimpleError::new(1, "missing operand")),
     };
 

src/uu/mv/src/mv.rs

@@ -146,7 +146,7 @@ pub fn uumain(args: impl uucore::Args) -> UResult<()> {
     let files: Vec<OsString> = matches
         .get_many::<OsString>(ARG_FILES)
         .unwrap_or_default()
-        .map(|v| v.to_os_string())
+        .cloned()
         .collect();
 
     let overwrite_mode = determine_overwrite_mode(&matches);

src/uu/nl/src/helper.rs

@@ -19,11 +19,11 @@ pub fn parse_options(settings: &mut crate::Settings, opts: &clap::ArgMatches) ->
         settings.section_delimiter = if delimiter.len() == 1 {
             format!("{delimiter}:")
         } else {
-            delimiter.to_owned()
+            delimiter.clone()
         };
     }
     if let Some(val) = opts.get_one::<String>(options::NUMBER_SEPARATOR) {
-        settings.number_separator = val.to_owned();
+        settings.number_separator = val.clone();
     }
     settings.number_format = opts
         .get_one::<String>(options::NUMBER_FORMAT)

src/uu/nl/src/nl.rs

@@ -195,7 +195,7 @@ pub fn uumain(args: impl uucore::Args) -> UResult<()> {
     }
 
     let files: Vec<String> = match matches.get_many::<String>(options::FILE) {
-        Some(v) => v.clone().map(|v| v.to_owned()).collect(),
+        Some(v) => v.cloned().collect(),
         None => vec!["-".to_owned()],
     };
 

src/uu/numfmt/src/numfmt.rs

@@ -211,9 +211,7 @@ fn parse_options(args: &ArgMatches) -> Result<NumfmtOptions> {
         _ => unreachable!("Should be restricted by clap"),
     };
 
-    let suffix = args
-        .get_one::<String>(options::SUFFIX)
-        .map(|s| s.to_owned());
+    let suffix = args.get_one::<String>(options::SUFFIX).cloned();
 
     let invalid =
         InvalidModes::from_str(args.get_one::<String>(options::INVALID).unwrap()).unwrap();

src/uu/paste/src/paste.rs

@@ -44,7 +44,7 @@ pub fn uumain(args: impl uucore::Args) -> UResult<()> {
     let files = matches
         .get_many::<String>(options::FILE)
         .unwrap()
-        .map(|s| s.to_owned())
+        .cloned()
         .collect();
     let line_ending = LineEnding::from_zero_flag(matches.get_flag(options::ZERO_TERMINATED));
 

src/uu/ptx/src/ptx.rs

@@ -720,7 +720,7 @@ pub fn uumain(args: impl uucore::Args) -> UResult<()> {
     let matches = uu_app().try_get_matches_from(args)?;
 
     let mut input_files: Vec<String> = match &matches.get_many::<String>(options::FILE) {
-        Some(v) => v.clone().map(|v| v.to_owned()).collect(),
+        Some(v) => v.clone().cloned().collect(),
         None => vec!["-".to_string()],
     };
 

src/uu/shuf/src/shuf.rs

@@ -75,7 +75,7 @@ pub fn uumain(args: impl uucore::Args) -> UResult<()> {
             let headcounts = matches
                 .get_many::<String>(options::HEAD_COUNT)
                 .unwrap_or_default()
-                .map(|s| s.to_owned())
+                .cloned()
                 .collect();
             match parse_head_count(headcounts) {
                 Ok(val) => val,

src/uu/sort/src/numeric_str_cmp.rs

@@ -394,8 +394,8 @@ mod tests {
         let (a_info, a_range) = NumInfo::parse(a, &NumInfoParseSettings::default());
         let (b_info, b_range) = NumInfo::parse(b, &NumInfoParseSettings::default());
         let ordering = numeric_str_cmp(
-            (&a[a_range.to_owned()], &a_info),
-            (&b[b_range.to_owned()], &b_info),
+            (&a[a_range.clone()], &a_info),
+            (&b[b_range.clone()], &b_info),
         );
         assert_eq!(ordering, expected);
         let ordering = numeric_str_cmp((&b[b_range], &b_info), (&a[a_range], &a_info));

src/uu/split/src/split.rs

@@ -506,10 +506,10 @@ impl Settings {
         };
 
         let result = Self {
-            prefix: matches.get_one::<String>(ARG_PREFIX).unwrap().to_owned(),
+            prefix: matches.get_one::<String>(ARG_PREFIX).unwrap().clone(),
             suffix,
-            input: matches.get_one::<String>(ARG_INPUT).unwrap().to_owned(),
-            filter: matches.get_one::<String>(OPT_FILTER).map(|s| s.to_owned()),
+            input: matches.get_one::<String>(ARG_INPUT).unwrap().clone(),
+            filter: matches.get_one::<String>(OPT_FILTER).cloned(),
             strategy,
             verbose: matches.value_source(OPT_VERBOSE) == Some(ValueSource::CommandLine),
             separator,

src/uu/sum/src/sum.rs

@@ -107,7 +107,7 @@ pub fn uumain(args: impl uucore::Args) -> UResult<()> {
     let matches = uu_app().try_get_matches_from(args)?;
 
     let files: Vec<String> = match matches.get_many::<String>(options::FILE) {
-        Some(v) => v.clone().map(|v| v.to_owned()).collect(),
+        Some(v) => v.cloned().collect(),
         None => vec!["-".to_owned()],
     };
 

src/uu/tail/src/follow/files.rs

@@ -40,7 +40,7 @@ impl FileHandling {
     pub fn insert(&mut self, k: &Path, v: PathData, update_last: bool) {
         let k = Self::canonicalize_path(k);
         if update_last {
-            self.last = Some(k.to_owned());
+            self.last = Some(k.clone());
         }
         let _ = self.map.insert(k, v);
     }

src/uu/tail/src/follow/watch.rs

@@ -279,7 +279,7 @@ impl Observer {
                         if !path.is_file() {
                             continue;
                         }
-                        let mut path = path.to_owned();
+                        let mut path = path.clone();
                         if path.is_relative() {
                             path = std::env::current_dir()?.join(path);
                         }
@@ -345,7 +345,7 @@ impl Observer {
                                     show_error!("{}: file truncated", display_name);
                                     self.files.update_reader(event_path)?;
                                 }
-                                paths.push(event_path.to_owned());
+                                paths.push(event_path.clone());
                             } else if !is_tailable && old_md.is_tailable() {
                                 if pd.reader.is_some() {
                                     self.files.reset_reader(event_path);
@@ -359,7 +359,7 @@ impl Observer {
                         } else if is_tailable {
                                 show_error!( "{} has appeared;  following new file", display_name.quote());
                                 self.files.update_reader(event_path)?;
-                                paths.push(event_path.to_owned());
+                                paths.push(event_path.clone());
                             } else if settings.retry {
                                 if self.follow_descriptor() {
                                     show_error!(
@@ -403,7 +403,7 @@ impl Observer {
                                     "{} cannot be used, reverting to polling",
                                     text::BACKEND
                                 );
-                                self.orphans.push(event_path.to_owned());
+                                self.orphans.push(event_path.clone());
                                 let _ = self.watcher_rx.as_mut().unwrap().unwatch(event_path);
                             }
                         } else {
@@ -451,7 +451,7 @@ impl Observer {
 
                 if self.follow_descriptor() {
                     let new_path = event.paths.last().unwrap();
-                    paths.push(new_path.to_owned());
+                    paths.push(new_path.clone());
 
                     let new_data = PathData::from_other_with_path(self.files.remove(event_path), new_path);
                     self.files.insert(

src/uu/test/src/parser.rs

@@ -164,7 +164,7 @@ impl Parser {
     /// The stream is unchanged and will return the same Symbol on subsequent
     /// calls to `next()` or `peek()`.
     fn peek(&mut self) -> Symbol {
-        Symbol::new(self.tokens.peek().map(|s| s.to_os_string()))
+        Symbol::new(self.tokens.peek().cloned())
     }
 
     /// Test if the next token in the stream is a BOOLOP (-a or -o), without